Improvement in middlings-separators



{ w. H. FRUEN Middlings Separators. 'No.2 06,869.

Patented Aug. 13, 1878.

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N-PETERS, PHOTO-UTHGGRAFHER WASmNGTGN- D C UNITED STATES PATENT ()FFIGE.

WVILLIAM H. FRUEN, ()F MINNEAPOLIS T()\VNSIIII, lll'lNNl lllN COUNTY,MINN.

IMPROVEMENT lN MlDDLlNGS-SEPARATORS.

Specification forming part of Letters IatentNo. 206,869, dated August13, 197 application filed April 3, 1878.

To all whom it may concern:

Beit known that I ,WILLIAM HENRY FRUEN, of the township of Minneapolis,in the county of Hennepin and State of Minnesota, have made certain newand useful Improvements in Brush-Motors for llliddlings-Purifiers, whichimprovement is fully set forth in the following specification andaccompanying drawings, in which- Figure 1 is a sectional side elevation.Fig. 2 is an end elevation, partially in section. Fig. 3 is across-section of the screen and traveling brush. Fig. 4 is a perspectiveview of the camwheel detached.

This invention relates to the travelingbrushes of middlings-purifiers3and consists in an arran gement of gears, cams, clutches, &c.,wherebythe brush is made to act upon the screen only a portion of the time andat regular intervals, as hereinafter set forth.

A is the frame of the purifier; I the screen, actuated by the eccentricO; and D D, the two shafts, carrying the brush E across beneath thescreen, all arranged in the usual manner.

Running loosely upon one end of the shaft D, outside the casing A, is agear-wheel, F, having upon its outer face a cam, a, which consists ofasemi-annular rib conforming to the peripheryof the gear-wheel, andhaving one end, I), chamfered 0K to form an inclined plane from thenatural face of the wheel to the face of the cam, as shown in Figs. 1and 4. The other end, 0, of the cam is cut square across, without anyincline. G is another gear-wheel, somewhat larger than F, and runningloosely upon the same shaft D, outside the wheel F, and provided withone half of a clutch, with two teeth, as shown in Fig. 1. H is a collarsliding upon afeather upon the same shaft D, so that it may slide alongthe shaft and still revolve with it. This sleeve is provided with theother side of the clutch to match the half upon the wheel G, and isprovided with a groove, 0, in which a yoke, g, fits. This yoke isattached to a bolt or red, h, sliding in a casing, '6, attached to thewheel G, and in which a spring is placed to actuate the bolt, the latterbeing so placed as to be pressed by the spring against the face of thecam a and wheel F.

k k are two pinions upon a shaft, m, which are made of a proper size tomesh into and operate the wheels F G, the shaft m being the one to whichthe power is applied to run the brush and operating mechanism.

By this arrangement it will be seen that the pinion 7:, being morenearly equal in size to the wheel F than the pinion 7." is to wheel G,will cause wheel F to travel faster than wheel G. This causes the cam ato overtake the bolt h and throw it out by means of the incline I),which carries the yoke c and sleeve H with it, and thus throw the clutchout of gear, and the two wheels F G being loose upon the shaft D, thelatter will, of course, remain stationary until the cam a has revolvedsuffieiently to pass the bolt h and allow it to jump forward over theend 0, against the face of the wheel F, and again throw the clutch intogear. This will again start the brush, which will be so geared as tomake one full revolution beneath the cloth and back again.

The sizes of the wheels and cam may be so varied as to give the brushany desired speed, movement, or time.

In the ordinary middlings purifiers the brushes are made to travelconstantly back and forth beneath the screens; but this is notnecessary, and soon wears out the cloth, as well as deteriorates themiddlings; but by my arrangement the gears may be so constructed as tobrush the cloth only when necessary, which is usually about five to tentimes per hour, varying, of course, for different grades of middlin gs.

I am aware that the traveling brush is not new; but such I do not claim,broadly.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. In combination with the mainpowershaft of a middlings=purifier and the brush for cleansing themeshes of the screen, intermediate means, substantially as described,for automatically and intermittently moving the brush.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM HENRY FRUFN.

Witnesses:

L. N. WoooWARn, Loris FEESER.

